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Twenty metal blocks (Posted on 2005-06-02)

Twenty metal blocks are of the same size and external appearance; some are aluminum, and the rest are duraluminum, which is heavier.

Using a pan balance to determine how many blocks are aluminum, what is the minimum number of weighings to be done?

See The Solution Submitted by pcbouhid

Rating: 3.5000 (2 votes)

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Answer

| Comment 18 of 19 |

The required minimum number of weighings is 11.

Posted by K Sengupta on 2009-01-09 12:42:55

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